EP3902505B1 - Selbstexpandierende strömungsablenkvorrichtung mit erhöhter knickfestigkeit und radialer festigkeit - Google Patents

Selbstexpandierende strömungsablenkvorrichtung mit erhöhter knickfestigkeit und radialer festigkeit Download PDF

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Publication number
EP3902505B1
EP3902505B1 EP19838978.5A EP19838978A EP3902505B1 EP 3902505 B1 EP3902505 B1 EP 3902505B1 EP 19838978 A EP19838978 A EP 19838978A EP 3902505 B1 EP3902505 B1 EP 3902505B1
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Prior art keywords
wires
thicker
finer
radial strength
kink resistance
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English (en)
French (fr)
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EP3902505C0 (de
EP3902505A1 (de
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Sujesh Sreedharan
Anku SREEKUMAR
Sreehari Unnikrishnan NAIR
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Sree Chitra Tirunal Institute For Medical Sciences And Technology
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Sree Chitra Tirunal Institute For Medical Sciences And Technology
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2002/068—Modifying the blood flow model, e.g. by diffuser or deflector
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2002/823—Stents, different from stent-grafts, adapted to cover an aneurysm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0015—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in density or specific weight
    • A61F2250/0017—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in density or specific weight differing in yarn density
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0036—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0039—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in diameter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
    • A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers

Definitions

  • the present invention relates to a self expanding flow diversion device with enhanced kink resistance and radial strength. More particularly the present invention relates to a intravascular medical device called as a self expanding flow diverter employed for diverting the flow within the parent vessel itself.
  • intracranial aneurysm refers to any localized ballooning or dilation of an artery in the brain. Since the wall of the dilated portion in the vessel experiences continuous blood flow, the inner muscles of the vessel (intima) can weaken progressively increasing the probability of aneurysm rupture resulting in a hemorrhagic stroke, which could be severely debilitating and fatal. So flow diversion is essential for rectifying such issues.
  • the patent document US0021816A1 (2007 ) describes that intracranial aneurysm is initiated and developed by hemodynamic interactions between blood flow and vessel wall.
  • An abnormal dilation of an artery in the brain that results from the weakening of the inner muscular layer of a blood vessel wall forms an intracranial aneurysm.
  • the vessel forms a blister, saccular or round berry shaped dilation that can become thin and rupture without warning.
  • the resultant bleeding into the space around the brain is called a subarachnoid hemorrhage (SAH). This kind of hemorrhage can lead to a stroke, coma and/or death.
  • SAH subarachnoid hemorrhage
  • the aneurysm clip was introduced by Dandy in1936. In 1990s, this tedious process was replaced by modern endovascular techniques. A majority of these techniques involve placement of coils, especially platinum, or placing liquid polymer of high viscosity inside the aneurysm by means of a high pressure microcatheter. These techniques are less invasive and cost effective when compared to craniotomy. Although the coiling is beneficial it has a few limitations: they can only be used for only small neck aneurysms which can hold the coil inside the aneurysm and the second risk factor is rupture of aneurysm while placing the coil within extreme thin walled aneurysm.
  • the third risk factor is that the coil may not fully fill the volume of aneurysm, since the ones deployed first may interfere with the deployment of the later ones.
  • US0125053 A1 discloses the introduction of liquid polymer into the aneurysm, but the potential consequences of high viscous fluid and time dependant solidification and clogging are unknown, and it has not been approved by US FDA.
  • the patent US0249620 A1 discusses about the usage of a combination of detachable coils and stents in case of wide neck aneurysms. Stents are used for holding the coil inside the aneurysm if the neck of the aneurysm is large preventing slippage of the coil from aneurysm into parent vessel. Also the stent helps to keep the parent vessel open.
  • the main disadvantage is that this procedure takes a long duration along with risk of perforation and incomplete filling of the aneurysm.
  • the patent US0021816A1 (2007 ) describes about a case with change in blood flow pattern after coiling and stenting. Flow pattern and wall stress fields are factors which play a crucial role in the healing of aneurysm after the endovascular procedure.
  • Flow diverter stents are the class of devices that divert flow away from the aneurysm and into the parent blood vessel, thus reducing chances of aneurysm rupture and promoting its healing. It can be manufactured from metal or polymer wires of different diameters braided together to form a tubular mesh. The pores in the mesh are made fine enough to block the blood flow into the aneurysm.
  • the flow diverter can be radially compressed during delivery and can be expanded in radial direction during deployment within the arterial lumen.
  • the vascular structures are extremely tortuous compared to other parts of the body. There are no significant surrounding soft tissues which support the arteries. It is very difficult to straighten the arterial wall since it is extremely thin. Straightening of the artery leads to kinks which result in flow reduction, thrombosis or direct arterial tear. Therefore the flow diverter should be flexible and adaptable to the tortuosity of the vessel boundaries without kinking.
  • Another object of the invention is to propose a self expanding flow diversion device with enhanced kink resistance and radial strength which is able to enhance radial force to adhere to the walls of the parent artery of complex shapes to scaffold the artery and to divert the blood away from the aneurysm with lesser chances of migration.
  • a still another object of the invention is to propose a self expanding flow diversion device with enhanced kink resistance and radial strength that includes several radio-opaque wires to enhance radio-opacity of the device causing the device to be visualized during the endovascular procedure.
  • the present invention is flow diverter stent braided using two sets of elastic wires (such as of Nitinol or CoCr alloys) in which the second set has thicker wires with higher stiffness.
  • the two sets of wires are braided together with the second set braided in either a checker-board pattern or a ring pattern.
  • This novel braid pattern gives enhanced kink resistance and better radial strength to the flow diverter. Even when bent of 180° and above, the flow diverter exhibits excellent radial strength and kink resistance without reduction of area throughout the cross section of the flow diverter. Additionally the thicker set of wires could include radio-opaque wires for better visibility.
  • the two patterns of the present invention differ in that the checker-board pattern has a greater flexibility whereas the ring pattern has a greater radial strength.
  • the present invention of the flow diverter device has a novel braiding pattern using two sets of wires in which the second set has thicker wire with higher stiffness.
  • the wires used for braiding could be of Nitinol, which is superelastic and can recover its shape from large strains.
  • the invention could be manufactured by conventional braiding process using a mandrel of suitable diameter and geometry. By changing the number of wires, braid angle and thickness of the wires (stiffer wire with flexural rigidity; here after mentioned as thicker wire), the porosity can be varied as per the requirement for flow diversion.
  • the thicker wires are braided together with the finer wires in an interleaved fashion, wherein the thicker wires passes over a multiplicity of finer wires which are braided continuously, on one side before crossing over to the other side of the finer wires.
  • the present invention with the checker-board pattern when unfolded and laid flat horizontally:
  • the tubular structure of flow diverters employs two different wire diameters.
  • the thicker wire can have a diameter of 1.5 to 4 times the diameter of the finer wire and the thicker wire overlaps the finer wire in either a checkerboard or ring pattern to achieve higher kink resistance and higher radial strength.
  • the thicker wire resists the deformation in the cross-section of the flow diverter so that even at smaller radius of curvature better kink resistance and radial strength can be achieved.
  • the thicker wires are lesser in number and can also be made radio-opaque or be replaced with radio opaque wires.
  • Radio opaque materials like gold, platinum, tantalum, iridium or their alloys can be used to form these wires, and utilize methods for incorporating radio opaque materials into the flow diverter such as chemical deposition, edge coating, sputtered deposition and vapor deposition to name a few.
  • these larger set of wires could be a tube of any elastic material such as nitinol and be filled with any radio-opaque material such as platinum.
  • the finer wires are braided so as to get a low porosity throughout the surface of the flow diverter.
  • the reinforcement of finer diameter wires with the thicker wires provides the higher radial strength with high kink resistance throughout the cross section of the device.
  • the shape setting of the device for a specific configuration is done with heat treatment which is well known in the art for shape memory alloys.
  • checker-board Two novel patterns for inter braiding the set of thicker wires with the set of finer wires are disclosed here and termed (i) checker-board and (ii) ring.
  • the thicker wire is diamond (1 ⁇ 1) braided and finer diameter wire is braided in a regular (2x2) pattern.
  • the thicker wire crosses above and below half the number of the finer wires inside a cell forming a checker-board pattern, and hence the name checker-board design.
  • the said checker-board pattern and the reinforcement of thicker wires in the said pattern enhance kink resistance and minimal loss of flexibility to the invented flow diverter device. The loss of flexibility is minimized by having the crossings of the thicker wire fully on one side of the finer braid so that the sliding of the thicker wires on each other is minimally restricted.
  • the thick lines (101, 110, 112 and 113) show the larger diameter wire, crossing above half the number of finer wires (103, 108, 115 and 105 respectively) as in Fig.1A .
  • the thick dotted lines (102, 109, 111 and 114) show the larger diameter wire crossing beneath half the number of finer wires (104, 107, 106 and 116 respectively) as in Fig 1A .
  • the checker-board pattern of the device is obtained.
  • Ring another pattern ( Fig2 and Fig 2A ) termed Ring, where the thicker wire is diamond braided and finer wire is braided in 2x2 pattern, and each thicker wire is crossing above and below all the finer wire in a unit cells forming a ring pattern, hence the name ring design.
  • the said ring pattern and the reinforcement of thicker wire in the said ring pattern enhance kink resistance and radial strength to the invented flow diverter device.
  • the thick line (201 and 202) shows the larger diameter wire crossing above all the finer wires (203 and 205 respectively) as in Fig 2A .
  • the thick dotted line (207 and 208) shows the larger diameter wire crossing below all the finer wire (204 and 206) as in Fig 2A .
  • the thicker set is a diamond braid whereas the finer set is a regular braid.
  • the pattern of braid within the sets could be varied to any braiding pattern such as diamond, regular or hercules.
  • N n ⁇ M + M
  • the number of wires 'n' could vary from 4 to 32 and 'M' could vary from 4 to 16.
  • the number of wires used for braiding 'n' depends on the required porosity of the device and 'M' on the required radial strength as well as kink resistance.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Pulmonology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Prostheses (AREA)

Claims (5)

  1. Selbstexpandierende Strömungsablenkvorrichtung mit erhöhter Knickfestigkeit und radialer Festigkeit, die in einem Arterienlumen verwendet wird, wobei die Vorrichtung umfasst:
    eine Reihe von Zellen, die durch vier dickere Drähte (101,110, 112, 113) begrenzt sind, wobei jede der Zellen aus feineren Drähten (Gruppen 103, 104, 105, 106, 107, 108, 115, 116) besteht, die zusammengeflochten sind,
    eine rohrförmige Einrichtung, die gebildet wird durch Wiederholen der Zellen in der axialen wie auch der Umfangsrichtung;
    dadurch gekennzeichnet,
    dass die dickere Gruppe von Drähten (101, 110, 112, 113) innerhalb einer Zelle angeordnet ist, wobei ein Abschnitt jedes dicken Drahtes oberhalb und der andere Abschnitt (102, 109, 111, 114) unterhalb der feineren Gruppe von Drähten (103, 104, 105, 116, 106, 115, 107, 108) konfiguriert ist, so dass eine X-förmige Kreuzung eines Paares dicker Drähte, die vollständig auf der Innenseite oder der Außenseite des feinen Geflechts angeordnet sind, erfolgt, wenn die nächste Kreuzung des dickeren Drahtes auf der gegenüberliegenden Seite des feinen Geflechts liegt und ein Schachbrettmuster bildet,
    wobei die das Schachbrettmuster aufweisende selbstexpandierende Strömungsablenkvorrichtung die Knickfestigkeit und die radiale Festigkeit des Geflechts bei minimalem Verlust an Flexibilität erhöht.
  2. Selbstexpandierende Strömungsablenkvorrichtung mit erhöhter Knickfestigkeit und radialer Festigkeit, die in einem Arterienlumen verwendet wird, wobei die Vorrichtung umfasst:
    eine Reihe von Zellen, die durch vier dickere Drähte (201, 202, 207, 208) begrenzt sind, wobei jede der Zellen aus feineren Drähten (Gruppen 203, 204, 205, 206) besteht, die zusammengeflochten sind, wobei
    eine rohrförmige Einrichtung gebildet wird durch Wiederholen dieser Zellen in der axialen wie auch der Umfangsrichtung;
    dadurch gekennzeichnet,
    dass die durch zwei oberhalb angeordnete (201, 202) dicke Drähte gebildeten oberen Grenzen der Zelle und die unteren Grenzen der Zelle unterhalb (207, 208) der feineren Gruppe von Drähten (203, 204, 205, 206), die einen kontinuierlichen Zick-Zack-Umfangsring aus dickeren Drähten bilden, auf einer Seite des feinen Geflechts liegen, und die benachbarten derartigen Ringe auf der gegenüberliegenden Seite des feinen Geflechts liegen und ein Ringmuster bilden,
    wobei die das Ringmuster aufweisende selbstexpandierende Strömungsablenkvorrichtung die Knickfestigkeit und die radiale Festigkeit erhöht.
  3. Selbstexpandierende Strömungsablenkvorrichtung nach Anspruch 1 und Anspruch 2, wobei alle oder ein Teil der dickeren Drähte (101, 110, 112, 113 und 201, 202, 207, 208) durch eine der folgenden Vorgehensweisen strahlenundurchlässig gemacht werden:
    a. Beschichten der Drähte mit strahlenundurchlässigen Materialien,
    b. Ersetzen derselben durch strahlenundurchlässige Drähte,
    c. Ersetzen derselben durch Rohre, die mit strahlenundurchlässigem Material gefüllt sind.
  4. Selbstexpandierende Strömungsablenkvorrichtung nach Anspruch 1, wobei der dickere Draht einen Durchmesser hat, der 1,4 bis 4 mal dem Durchmesser des feineren Drahtes entspricht, wobei die dickeren Drähte derart ausgebildet sind, dass sie einer Verformung des Querschnitts der Strömungsablenkungsvorrichtung standhalten und bewirken, dass selbst bei einem kleineren Krümmungsradius eine höhere Knickfestigkeit und radiale Festigkeit erzielt wird.
  5. Selbstexpandierende Strömungsablenkvorrichtung nach Anspruch 1, wobei die Verstärkung von Drähten mit feinerem Durchmesser mit dicken Drähten für eine höhere radiale Festigkeit mit Knickfestigkeit über den gesamten Querschnitt der Vorrichtung hinweg sorgt.
EP19838978.5A 2018-12-28 2019-12-19 Selbstexpandierende strömungsablenkvorrichtung mit erhöhter knickfestigkeit und radialer festigkeit Active EP3902505B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201841049649 2018-12-28
PCT/IN2019/050936 WO2020136672A1 (en) 2018-12-28 2019-12-19 A self expanding flow diversion device with enhanced kink resistance and radial strength

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EP3902505A1 EP3902505A1 (de) 2021-11-03
EP3902505B1 true EP3902505B1 (de) 2024-02-21
EP3902505C0 EP3902505C0 (de) 2024-02-21

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US (1) US11911302B2 (de)
EP (1) EP3902505B1 (de)
WO (1) WO2020136672A1 (de)
ZA (1) ZA202102576B (de)

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CN118178073A (zh) * 2024-03-29 2024-06-14 谱高医疗科技(南京)有限公司 一种可经桡动脉置入的颈动脉支架***

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WO2020136672A1 (en) 2020-07-02
ZA202102576B (en) 2022-01-26
EP3902505C0 (de) 2024-02-21
BR112021005851A2 (pt) 2021-07-27
US11911302B2 (en) 2024-02-27
EP3902505A1 (de) 2021-11-03

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